Contacts of the helix formed by residues 5 - 13 (chain J) in PDB entry 2I2X
Residue contacts within the protein are
derived with the CSU software (Sobolev V., Sorokine A.,
Prilusky J., Abola E.E. and Edelman M. (1999) Automated
analysis of interatomic contacts in proteins.
Bioinformatics, 15, 327-332). A
short description of the analytical approach
is given at the end of the page.
Note:
Non-standard 3 letter residue
codes indicate a heterogroup. To identify
and analyse, use LPC software
Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC - hydrophobic-hydrophilic contact (destabilizing contact)
+/- - indicates presence/absence of a specific contacts
* - indicates residues forming contacts by their side chain
(including CA atoms)
Residues in contact with THR 5 (chain J).
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Specific contacts
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Residue Dist Surf HB Arom Phob DC
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411I LYS* 4.3 1.3 - - - -
3J ASP 4.1 1.0 + - - +
4J PHE* 1.3 79.1 - - - +
6J GLU* 1.3 62.6 + - - +
7J ALA* 3.2 10.4 + - - +
8J SER* 2.9 30.0 + - - +
9J LEU* 3.0 17.7 + - - +
345K GLU 5.9 1.6 - - - +
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Residues in contact with GLU 6 (chain J).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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16E GLU* 4.0 17.9 - - - +
23E LYS* 6.5 1.3 - - - -
410I GLY 5.4 2.3 - - - +
411I LYS* 3.6 34.4 - - + +
5J THR* 1.3 72.4 - - - +
7J ALA* 1.3 62.7 + - - +
9J LEU* 3.6 5.4 + - - +
10J LYS* 3.2 23.2 + - - +
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Residues in contact with ALA 7 (chain J).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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5J THR* 3.2 8.8 + - - +
6J GLU* 1.3 78.6 - - - +
8J SER* 1.3 62.9 + - - +
10J LYS* 3.4 11.6 + - - +
11J LYS* 3.3 26.0 + - + +
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Residues in contact with SER 8 (chain J).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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4J PHE* 3.8 12.3 - - - -
5J THR* 2.9 27.0 + - - +
7J ALA* 1.3 73.8 - - - +
9J LEU* 1.3 67.9 - - - +
11J LYS* 2.8 16.6 + - - +
12J VAL* 3.2 13.5 + - - +
345K GLU* 2.9 50.4 + - - +
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Residues in contact with LEU 9 (chain J).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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362I TYR* 3.7 39.5 - - + -
411I LYS* 3.6 41.1 - - + +
413I GLU* 6.2 0.9 - - + -
4J PHE* 3.9 19.4 - - + +
5J THR 3.0 12.7 + - - +
6J GLU* 3.7 11.4 - - - +
7J ALA 3.4 0.2 - - - -
8J SER* 1.3 74.6 - - - +
10J LYS* 1.3 64.6 - - - +
12J VAL* 3.0 12.3 + - - -
13J LEU* 3.5 32.4 + - + +
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Residues in contact with LYS 10 (chain J).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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23E LYS* 4.3 26.9 - - - +
24E TYR* 5.3 12.3 - - - -
25E PRO* 5.9 2.5 - - + -
6J GLU 3.2 10.5 + - - +
7J ALA* 3.4 13.7 - - - +
8J SER 3.1 0.2 - - - -
9J LEU* 1.3 80.1 - - - +
11J LYS* 1.3 61.2 + - + +
13J LEU 3.6 12.3 - - - +
14J THR* 4.5 5.2 + - - -
79K PRO* 5.7 1.0 - - - +
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Residues in contact with LYS 11 (chain J).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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7J ALA* 3.3 14.3 + - + +
8J SER* 2.8 10.4 + - - +
10J LYS* 1.3 80.0 - - + +
12J VAL* 1.3 59.6 + - + +
36K ALA 4.8 4.2 + - - -
37K GLY* 3.8 21.0 + - - -
38K TYR* 4.8 21.2 - - + +
79K PRO* 3.8 17.2 - - - +
341K ASN* 5.7 1.7 + - - -
345K GLU* 3.1 35.5 + - - +
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Residues in contact with VAL 12 (chain J).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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359I SER 4.2 14.6 - - - +
363I ARG* 4.5 7.1 + - - +
4J PHE* 3.7 30.1 - - + -
8J SER 3.7 9.2 - - - +
9J LEU 3.0 7.3 + - - +
11J LYS* 1.3 78.3 - - + +
13J LEU* 1.3 66.4 + - + +
78K PHE* 5.7 0.2 - - - -
79K PRO* 3.5 18.2 - - - +
338K ALA* 4.6 14.6 - - + +
341K ASN* 4.1 23.8 + - + +
342K THR* 4.0 14.4 - - - +
345K GLU* 3.8 20.2 - - + -
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Residues in contact with LEU 13 (chain J).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
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358I LEU 5.5 1.3 - - - +
359I SER 3.7 24.0 - - - +
362I TYR* 3.8 20.6 - - + +
363I ARG* 3.7 43.7 - - + +
4J PHE* 5.7 0.9 - - + -
9J LEU* 3.5 32.7 + - + +
10J LYS* 3.6 8.9 - - - +
11J LYS 3.7 0.4 - - - -
12J VAL* 1.3 79.6 - - + +
14J THR* 1.3 75.6 + - - +
15J ARG* 4.4 5.8 - - + +
77K GLY* 3.3 14.6 - - - +
79K PRO* 4.3 5.2 - - - -
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A short description of the
analytical approach
The contact analysis used in this page
is based upon the approach
developed in:
Sobolev V., Wade R.C., Vriend G.
and Edelman M. PROTEINS (1996)
25, 120-129.
Contact legitimacy depends on the hydrophobic-hydrophilic
properties of the contacting atoms. In order to
define it, for each inter-atomic contact,
eight atom classes have been introduced:
I Hydrophilic - N and O that can donate and accept hydrogen bonds
(e.g., oxygen of hydroxyl group of Ser. or Thr)
II Acceptor - N or O that can only accept a hydrogen bond
III Donor - N that can only donate a hydrogen bond
IV Hydrophobic - Cl, Br, I and all C atoms that are not in
aromatic rings and do not have a covalent bond to
a N or O atom
V Aromatic - C in aromatic rings irrespective of any other
bonds formed by the atom
VI Neutral - C atoms that have a covalent bond to at least one
atom of class I or two or more atoms from class II
or III; atoms; S, F, P, and metal atoms in all cases
VII Neutral-donor - C atoms that have a covalent bond with only one
atom of class III
VIII Neutral-acceptor - C atoms that have a covalent bond with only
one atom of class II
For each pair of contacts the state of legitimacy
is shown below:
Legend:
+, legitimate
-, illegitimate
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Atomic class I II III IV V VI VII VIII
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I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
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Warning!
Atom classes for heterogroups are automatically
assigned based on the atomic coordinates. However, in
three cases (see below) the automatic assignment
is currently ambiguous. In these
cases, the user is advised to manually analyse
the full list of contacts using
LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are
considered "aromatic" (Class V) if the ring is approximately
planar, and "hydrophobic" (Class IV) or "neutral" (Classes
VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
"hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
"carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).
Please E-mail any
questions and/or suggestions concerning this page to
Vladimir.Sobolev@weizmann.ac.il